self Maths Puzzle

The current erection cost of a structure is Rs. 13,200. If the labour wages per day increase by 1/5 of the current wages and the working hours decrease by 1/24 of the current period, then the new cost of erection in Rs. is
option
(A) 16,500
(B) 15,180
(C) 11,000
(D) 10,120

Read Solution (Total 2)

self Other Question
In a kilometre race, if A gives B a 40 mtr start, A wins by 19 sec. But if A gives B a 30 sec start, B wins by 40 mtr. Find the time taken by B to run 5,000 mtr? two boats go downstream from point x to point y.the faster boat covers the distance from x to y 1.5 times as fast as the slower boat.it sis known that for every hour the slower boat lags behind the faster boat by 8 km.however,if they go upstream,then the faster boatcovers the distance from y tox in half thetime as the slower boat.find the speed of faster boat in still water.